JP3043890U - Instantaneous power supply type solenoid valve - Google Patents

Abstract

(57) [Abstract] (Correction) [Problem] To provide a momentary power supply type solenoid valve that operates by instantaneously supplying power only at the initial operation of the valve and that keeps the valve open and closed even when there is no power supply. provide. An electromagnet 3 is provided on an outer peripheral edge of a bobbin 2 coupled to a valve body 1, a plunger 4 is provided in an inner space of the bobbin 2, a valve seat 5 is provided at a lower end thereof, and a spring is provided at an upper end thereof. In the arranged solenoid valve, bobbin 2
An open circuit projecting piece 10 and a circuit closing projecting piece 13 having inclined surfaces 11 and 14 formed on the upper ends thereof are alternately arranged on the inner peripheral edge of the open circuit groove 10, and an open circuit groove 12 is formed between the open circuit projecting piece 10 and the circuit closing projecting piece 13. The closed groove 15 is formed, and the plunger 4 is provided with an upper rotary body 20 having three projecting pieces 22 at equal intervals and a lower fixed body 23 having six projecting pieces 25 at equal intervals.
An inclined surface 21 is formed at the lower end of 0, and an upper inclined surface 24 contacting the lower inclined surface 21 of the upper rotary body 20 is formed at the upper end of the lower fixed body 23.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a solenoid valve capable of opening and closing a valve only by momentary power supply, and in particular, not only can the valve be opened and closed by supplying only momentary power to the solenoid, but the power can be shut off. Even so, it relates to a solenoid valve that keeps the valve open and closed.

[0002]

[Prior art]

 Generally, solenoid valves are widely used in devices that control the flow paths of air, water, oil, gas, and the like. Of the conventional solenoid valves, the direct-acting solenoid valve has an electromagnet in the valve body, and a flow path that connects the inlet and outlet is formed inside the valve body, and the valve seat is separated from this flow path together with the plunger. It is opened and closed by being or closely attached. That is, if power is supplied to the electromagnet with the downward elastic force of the spring and the plunger moving forward and backward by the electromagnet blocking the flow path, the plunger moves upward with the valve seat toward the electromagnet to open the flow path. If the supply of power is stopped in this state, the elastic force of the spring causes the plunger and valve seat to face downward, blocking the flow path.

However, the above-mentioned direct-acting solenoid valve opens and closes the flow path by the downward movement of the plunger together with the valve seat. Therefore, when it is installed in a device with high working pressure, the force of the solenoid or the flow path is increased. Not only should the flow rate be made smaller, but this also caused the problem that the flow rate that would pass through would be reduced.

A pilot solenoid valve which has solved the above-mentioned problems is characterized by including a diaphragm and a diaphragm holder provided between an inlet and an outlet, and a chamber having a first flow path and a second flow path. This pilot type solenoid valve has the advantage that it can be opened and closed using the pressure at the inlet to maintain stable opening and closing even if the operating pressure is high, and the flow rate is increased.

Here, a solenoid valve of a type that is normally closed and then opened when power is supplied to an electromagnet is called a normally closed solenoid valve. Conversely, a normally open solenoid valve is normally open. When power is supplied from a valve, the type that is closed is called a normally open solenoid valve.

In such a direct-acting type or pilot type normally open type or normally closed type solenoid valve, power must be continuously supplied to the electromagnet in order to maintain the open and closed states. Therefore, power consumption is large and electrical noise is generated. However, there is a problem that not only the life of the product is shortened, but also a separate means for supplying power is required especially when the product is used in a place where power supply is not possible.

In order to solve the above-mentioned problems, an instantaneous operation type solenoid valve 50 as shown in FIG. 8 has been developed. The momentary operation type solenoid valve 50 uses the permanent magnet 51 to supply power to the electromagnet 52 only in the initial operation to add the force of the electromagnet 52 and the force of the permanent magnet 51 to move the plunger 53 by the attraction force. After the power is shut off, the magnetic force of the permanent magnet 51 keeps the plunger 53 attracted. When the circuit is closed, the magnetic force of the permanent magnet 51 is canceled by changing the direction of the current supplied to the electromagnet 52, and the elastic force of the spring 54 lowers the plunger 53 to shut off the valve.

However, the momentary operation type solenoid valve uses a permanent magnet to increase the manufacturing cost and complicate the structure. Also, since the magnetic force of the permanent magnet is not constant, it is difficult to ensure products of uniform quality. In particular, since the current direction of the electromagnet is changed when opening and closing the valve, it can be used only by direct current, and since the normally open valve and the normally closed valve have different structures, it is necessary to manufacture a separate valve for each application. There is a problem.

[0009]

Therefore, the present invention has been devised in view of the above-mentioned circumstances, and its purpose is to operate by instantaneously supplying power only during initial operation of the valve, and It is an object of the present invention to provide an instantaneous power supply type solenoid valve that keeps the valve open and closed even when the power is on.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides an electromagnet on an outer peripheral edge of a bobbin connected to a valve body, a plunger in an inner space of the bobbin, and a valve seat at a lower end of the plunger. Further, in a solenoid valve in which a spring is arranged at the upper end thereof, an open circuit projecting piece and a circuit closing projecting piece each having an inclined surface formed on the upper end thereof are alternately arranged at the inner peripheral edge of the bobbin, and the open circuit projecting piece and the circuit projecting piece are closed. An open circuit groove and a closed circuit groove are formed between the upper rotor and the upper rotor, and the plunger includes an upper rotor having three protrusions at equal intervals and a lower fixed member having six protrusions at equal intervals. A lower end inclined surface is formed at a lower end of the open circuit protruding piece and a closed circuit protruding piece is in contact with the lower surface, and an upper end inclined surface is formed at an upper end of the lower fixed body, which is in contact with a lower inclined surface of the upper rotating body. To be done To.

[0011]

[Embodiment of the invention]

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. As shown in FIG. 1, the solenoid valve of the present invention includes a valve body 1, a bobbin 2 built in the valve body 1, an electromagnet 3 attached to an outer peripheral surface of the bobbin 3, and a bobbin 2 inside. The plunger 4 is provided with a spring 6 and a valve seat 5 provided at the upper and lower ends of the plunger 4, respectively.

As shown in FIG. 2, on the inner peripheral edge of the bobbin 2, open-circuit protruding pieces 10 and closed-circuit protruding pieces 13 having inclined surfaces 11 and 14 formed on the upper ends thereof are alternately arranged. An open circuit groove 12 and a closed circuit groove 15 are formed between and the closed circuit projecting piece 13.

Further, the plunger 4 includes an upper rotary body 20 having three projecting pieces 22 at equal intervals and a lower fixed body 23 having six projecting pieces 25 at equal intervals. A lower end inclined surface 21 that contacts the inclined surface 11 of the open circuit protruding piece 10 and the inclined surface 14 of the closed circuit protruding piece 13 is formed at the lower end of the upper rotating body 20, and the upper rotating body 2 is provided at the upper end of the lower fixed body 23. An upper end inclined surface 24 is formed in contact with the lower end inclined surface 21 of 0.

As shown in FIG. 3, the present invention thus constructed has a valve seat 5 arranged at the lower end of the plunger 3 to close the valve as shown in FIGS. 4 and 5A. With the three projecting pieces 22 provided on the upper rotary body 20 of the plunger 4 being inserted into the closed groove 15 inside the bobbin 2, the lower end inclined surface 21 of the upper rotary body 20 is fixed by the elastic force of the spring 6. Maintain a state of being partially in contact with the upper end inclined surface 24 of the body 23.

In this state, power is supplied to the electromagnet 3 attached to the outer peripheral surface of the bobbin 2 to raise the plunger 4 as shown in FIG. 5B. 23 pushes up the upper rotary body 20 and the protruding piece 22 of the upper rotary body 20 is detached from the closed groove 15, so that the upper rotary body 20 detached from the closed groove 15 has a lower end inclined surface 21 as shown in FIG. 5C. The fixed body 23 slides from the upper inclined surface 24 and moves to the left side.

Next, when the power supplied to the electromagnet 3 is cut off, the elastic force of the spring 6 causes the upper rotating body 20 and the plunger 4 to move downward. As shown in FIG. 7, the stepped jaw 4a of the plunger 4 is attached to the projecting jaw 20a formed on the inner peripheral surface of the upper rotary body 20 while stopping while being locked to the inclined surface of the upper end of the open circuit groove 12. Since the plunger 4 is locked and the descent of the plunger 4 is stopped, the valve body 1 can be kept open even if the power supply to the electromagnet 3 is cut off.

Further, when closing the valve body 1 that has been opened as described above, if the power is supplied again to the electromagnet 3 to raise the plunger 4, the lower fixed body 23 of the plunger 4 moves the upper rotary body 20. When pushed up, the lower end inclined surface 21 of the upper rotary body 20 slides to the left along the upper end inclined surface 24 of the lower fixed body 23. If the power supplied to the electromagnet is cut off in this state, the elastic force of the spring 6 causes the protruding piece 22 of the upper rotor 20 to be inserted into the closed groove 15 inside the bobbin 2 and the valve seat 5 descending together with the plunger 4. The valve body 1 is closed.

On the other hand, if the solenoid valve of the present invention is removed from the valve body 1, it can also be used as a device for linearly moving a certain distance using a cylinder.

[0019]

[Effect of the invention]

 As described above, according to the present invention, not only can the valve be opened and closed only by the instantaneous supply of power, but the open / closed state can be maintained to reduce power loss, while using either DC or AC power supply. It becomes available.

Further, according to the present invention, the temperature rise and noise of the coil due to continuous power supply can be prevented and the life of the solenoid valve can be extended.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a solenoid valve according to the present invention.

FIG. 2 is an exploded perspective view of an essential part of the present invention.

FIG. 3 is an enlarged cross-sectional view of an essential part showing a closed state of the solenoid valve of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

5A to 5C are operation state diagrams of the present invention.

FIG. 6 is an enlarged cross-sectional view of an essential part showing a state in which the solenoid valve of the present invention is opened.

7 is a sectional view taken along line BB of FIG.

FIG. 8 is a longitudinal sectional view showing a conventional instantaneous power supply type solenoid valve.

[Explanation of symbols]

 1 Main body 2 Bobbin 3 Electromagnet 4 Plunger 5 Valve seat 10 Open circuit projecting piece 12 Open circuit groove 13 Closing circuit projecting piece 15 Closing groove 20 Upper rotating body 23 Lower fixed body

Claims (2)

[Utility model registration claims] 1. An electromagnet is provided on an outer peripheral edge of a bobbin coupled to a valve body, a plunger is provided in an inner space of the bobbin, a valve seat is disposed at a lower end of the plunger, and a spring is provided at an upper end thereof. In the arranged solenoid valve, an open circuit protruding piece and a circuit closing protruding piece having an inclined surface formed on the upper end of the inner peripheral edge of the bobbin are alternately arranged, and an open circuit is provided between the open circuit protruding piece and the circuit closing protruding piece. A groove and a closed groove are formed, the plunger is provided with an upper rotating body having three projecting pieces at equal intervals and a lower fixed body having six projecting pieces at equal intervals, and the open circuit projecting portion is provided at a lower end of the upper rotating body. A lower end inclined surface that contacts the inclined surface of the piece and the inclined surface of the closed circuit protruding piece is formed,
An instantaneous power supply type solenoid valve, wherein an upper end inclined surface that is in contact with a lower end inclined surface of the upper rotating body is formed at an upper end of the lower fixed body. 2. The instantaneous power supply type solenoid according to claim 1, wherein a projecting jaw is formed on an inner peripheral surface of the upper rotary body to limit the lowering of the plunger when the valve is opened. valve.